Both actually for me is the same so I will not choose between those but for more convinience, I say online gambling. With online casino you will not need to go out and drive the car to go in a casino in the middle of the night just because you feel like you want to waste some money. When it comes to the game though I must say that offline casino are still the best since I think online gambling sites, has some kind of program that every gamblers will eventually loose every money they have in their bankroll.